[Nmock-general] nmock/src/NMock/Constraints Constraints.cs,1.3,1.4

[<joe...@us...>]

Update of /cvsroot/nmock/nmock/src/NMock/Constraints
In directory sc8-pr-cvs1:/tmp/cvs-serv30252/src/NMock/Constraints

Modified Files:
	Constraints.cs 
Log Message:
Added PropertyIs decorator for constraints to allow a constraint to test the value of a property rather than the object itself.

Index: Constraints.cs
===================================================================
RCS file: /cvsroot/nmock/nmock/src/NMock/Constraints/Constraints.cs,v
retrieving revision 1.3
retrieving revision 1.4
diff -C2 -d -r1.3 -r1.4
*** Constraints.cs	31 Dec 2002 21:36:37 -0000	1.3
--- Constraints.cs	21 Jan 2003 17:36:00 -0000	1.4
***************
*** 2,5 ****
--- 2,6 ----
  using System.Text;
  using System.Text.RegularExpressions;
+ using System.Reflection;
  
  namespace NMock.Constraints
***************
*** 357,360 ****
--- 358,398 ----
  		{
  			get { return "<" + expected + ">"; }
+ 		}
+ 	}
+ 	
+ 	/// <summary>
+ 	/// This constraint decorates another constraint, allowing it to test
+ 	/// a property of the object, rather than the property itself.
+ 	/// </summary>
+ 	public class PropertyIs : IConstraint
+ 	{
+ 		private string property;
+ 		private IConstraint constraint;
+ 		
+ 		public PropertyIs(string property, object expected)
+ 		{
+ 			this.property = property;
+ 			constraint = expected as IConstraint;
+ 			if (constraint == null)
+ 			{
+ 				constraint = new IsEqual(expected);
+ 			}
+ 		}
+ 		
+ 		public bool Eval(object val)
+ 		{
+ 			if (val == null)
+ 			{
+ 				return false;
+ 			}
+ 			Type type = val.GetType();
+ 			PropertyInfo propertyInfo = type.GetProperty(property);
+ 			object propertyValue = propertyInfo.GetValue(val, null);
+ 			return constraint.Eval(propertyValue);
+ 		}
+ 		
+ 		public string Message
+ 		{
+ 			get { return String.Format("Property {0}: {1}", property, constraint.Message); }
  		}
  	}